Found in 3 comments on Hacker News
rodh257 · 2013-01-02 · Original thread
For reference have a look at the % price difference for other book sellers, like O'Reilly: http://shop.oreilly.com/product/9780596802363.do

I'd be selling it for $24 for Ebook (and make it available in PDF/Epub/Mobi to cover all readers), $29 for print, $32 for Print + Ebook.

rachelj · 2010-11-16 · Original thread
The table of contents is now available on the book's catalog page (http://oreilly.com/catalog/9780596802356/), and you can view the table of contents and preview snippets of the content on Safari (http://my.safaribooksonline.com/9781449389802?portal=oreilly...).
3pt14159 · 2010-11-16 · Original thread
Has anyone read "Data Analysis with Open Source Tools"? http://oreilly.com/catalog/9780596802356/ I can't seem to look through the book, not even at Amazon, which I like to do before buying something.